A1042 Shuffling Machine

Shuffling is a procedure used to randomize a deck of playing cards. Because standard shuffling techniques are seen as weak, and in order to avoid “inside jobs” where employees collaborate with gamblers by performing inadequate shuffles, many casinos employ automatic shuffling machines. Your task is to simulate a shuffling machine.

The machine shuffles a deck of 54 cards according to a given random order and repeats for a given number of times. It is assumed that the initial status of a card deck is in the following order:

S1, S2, …, S13,
H1, H2, …, H13,
C1, C2, …, C13,
D1, D2, …, D13,
J1, J2

where “S” stands for “Spade”, “H” for “Heart”, “C” for “Club”, “D” for “Diamond”, and “J” for “Joker”. A given order is a permutation of distinct integers in [1, 54]. If the number at the i-th position is j, it means to move the card from position i to position j. For example, suppose we only have 5 cards: S3, H5, C1, D13 and J2. Given a shuffling order {4, 2, 5, 3, 1}, the result will be: J2, H5, D13, S3, C1. If we are to repeat the shuffling again, the result will be: C1, H5, S3, J2, D13.

Input Specification:
Each input file contains one test case. For each case, the first line contains a positive integer K (≤20) which is the number of repeat times. Then the next line contains the given order. All the numbers in a line are separated by a space.

Output Specification:
For each test case, print the shuffling results in one line. All the cards are separated by a space, and there must be no extra space at the end of the line.

Sample Input:
2
36 52 37 38 3 39 40 53 54 41 11 12 13 42 43 44 2 4 23 24 25 26 27 6 7 8 48 49 50 51 9 10 14 15 16 5 17 18 19 1 20 21 22 28 29 30 31 32 33 34 35 45 46 47

Sample Output:
S7 C11 C10 C12 S1 H7 H8 H9 D8 D9 S11 S12 S13 D10 D11 D12 S3 S4 S6 S10 H1 H2 C13 D2 D3 D4 H6 H3 D13 J1 J2 C1 C2 C3 C4 D1 S5 H5 H11 H12 C6 C7 C8 C9 S2 S8 S9 H10 D5 D6 D7 H4 H13 C5

Code:

#pragma warning(disable: 4996)
#include <cstdio>
#include <cstdlib>
#include <cmath>

using namespace std;

int *shuffle(int card[], int order[]) {//card是洗牌前的牌序
	int *result = (int *)malloc(54 * sizeof(int));

	for (int i = 0; i < 54; i++)//循环54次
		result[order[i]] = card[i];

	return result;//题比较简单，就没有释放空间
}

int main(int argc, char *argv[]) {
	int k;//k<=20
	scanf("%d", &k);

	int card[54];//每个数字对应一张固定的牌，比如card[3]是15，那么第三张牌就是Heart2
	int *result;
	for (int i = 0; i < 54; i++)//单目运算符就不用空格了
		card[i] = i + 1;

	int order[54];//洗牌顺序
	for (int i = 0; i < 54; i++) {
		scanf("%d", &order[i]);
		order[i]--;//对应数组位置
	}

	//洗牌
	result = card;
	for (int i = 0; i < k; i++)
		result = shuffle(result, order);

	//按格式输出结果
	char map[5] = { 'S', 'H', 'C', 'D', 'J' };
	int j = 0;
	for (int i = 0; i < 54; i++) {
		j = fmod(result[i], 13);
		if (j != 0)
			printf("%c%d", map[result[i] / 13], j);
		else
			printf("%c13", map[result[i] / 13 - 1]);
		if (i != 53)
			printf(" ");
	}

	system("pause");
	return 0;
}